A small, super quality dry bag with a roll-top closure. These have a special one-way purge valve which blows out excess air when you start to roll the top. We got these in 2-piece sets, and so will you!
MACS Sack is the king daddy of packsacks and dry bags, just the kind of proper good thing you'll have to purchase only once. It's got a roll-top closure to always pack up the contents to the minimum space required, while the excess air blows out through the purge valve. Nice. On the bottom there's a simple handle to help getting stuff out.
These are just the size to it most rucksack side pockets. Because the sack has unlimited waterproofness, you can use one as the emergency cocoon containing a dry underwear set and some firemaking tools. Also pretty good for stowing away a thermal jacket and trousers too, just so we can advertise our own Särmä TST L3 Thermal Jacket and Thermal Trousers here.
Made by Cascade Designs for the US armed forces. Made in USA! The condition is unissued, so you'll get a brand new pair.